Chapter 1: Answers to Stop to Think Questions and Odd-Numbered Exercises and Problems

Stop to Think Questions

  1. 1. B. The images of B are farther apart, so it travels a larger distance than does A during the same intervals of time.

  2. 2. a. Dropped ball. b. Dust particle. c. Descending rocket.

  3. 3. e. The average velocity vector is found by connecting one dot in the motion diagram to the next.

  4. 4. b. v ⃗2=v ⃗1+Δv ⃗, and Δv⃗ points in the direction of a→.

    The figure illustrates the motion diagram of a moving object.

  5. 5. d>c>b=a

Exercises and Problems

  1. 1.

    The figure illustrates a pictorial representation of an airplane landing in a horizontal plane in five frames simultaneously.

  2. 3.

    The figure illustrates the motion diagram of a rocket launch.

  3. 5.

    The figure illustrates the motion diagram of a moving object depicted by a dot.

  4. 7.

    The figure illustrates the motion diagram of a moving object.

  5. 9.

    The figure illustrates the motion diagram of an object depicted by a dot.

  6. 11.

  7. 13.

    The figure illustrates the motion diagram of an object in motion depicted in 9 frames.

  8. 15.

    The figure illustrates the motion diagram of a wad depicted by a dot.

  9. 17.

    The figure consists of three parts that illustrate the velocity and acceleration vectors acting on a moving object using a motion diagram.

  10. 21.

    The figure illustrates the ascending motion of a rocket in a vertical y plane.

  11. 23.

    1. 4

    2. 3

    3. 3

    4. 1

  12. 25.

    1. 1.9 m

    2. 1.09×1014 s

    3. 2.2×10−4 m/s

    4. 5.7×1010 m2

  13. 27.

    1. 12 in

    2. 50 mph

    3. 3 mi

    4. 0.3 in

  14. 29.

    1. 846

    2. 7.9

    3. 5.77

    4. 13.1

  15. 31.

    1. 15 m

  16. 33. 32 ms

  17. 35.

    The figure illustrates the pictorial representation and the motion diagram of a moving car.

  18. 37.

    The figure consists of three parts that illustrate the velocity and acceleration vectors of a moving object using a motion diagram.

  19. 39.

    The figure illustrates the pictorial representation and the motion diagram of a person in motion.

  20. 41.

    The figure illustrates the pictorial representation and the motion diagram of a car moving on an inclined plane.

  21. 43.

    The figure illustrates the pictorial representation and the motion diagram of two moving cars.

  22. 49.

  23. 51.

  24. 53. Smallest: 9800 cm2, largest: 11,000 cm2

  25. 55. 2.9×10−4 m3

  26. 57.

    1. 83.3 kg/m3

    2. 810 kg/m3